Perhaps you should try some spelling variations:
thien van » thi van
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cua van » cua ban, cua vat, cua dan
hanh di » hanh vi, hanh de, danh di
hang di » hang doi, hang vi, hang dien
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. thien van nam cua van ((hanh di) or (hang di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. thien van nam cua van ((hanh di) OR (hang di)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. thien van nam cua van ((hanh di) or (hang di)) cua tre*.